/*
    The MIT License

    Copyright (c) 2010 IFMO/GameDev Studio

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    THE SOFTWARE.
*/

#pragma once 

/*-----------------------------------------------------------------------------
	Atoms :
-----------------------------------------------------------------------------*/

const uint HASH_SIZE	=	16384;
const uint ATOM_RESERVE		=	32;


class EAtom {
	public:
						EAtom		( void );
						~EAtom		( void );
		const char		*CStr		( void ) const;
		uint			Length		( void ) const;
		void			Assign		( const char *str, uint begin, uint end );
		bool			Compare		( const char *str );
		
	public:
		int				ref_count;			//	ref counter, -1 means that entry was deleted, is used for open addressing
	protected:
		char			*Ptr		( void );
		std::vector<char>	key;				//	hash key
	private:
		bool	operator	==	( const EAtom &other );
		EAtom	&operator	=	( const EAtom &other );
				EAtom			( const EAtom &other );
	};


class	EAtoms : public IAtoms {
	public:
							EAtoms		( void );
							~EAtoms		( void );
		virtual uint		Add			( const char *str, uint begin, uint end );
		virtual uint		Add			( uint atom );
		virtual void		Remove		( uint atom );
		virtual const char	*GetName	( uint atom ) const;
		virtual uint		GetLength	( uint atom ) const;
		
	protected:
		uint	Find	( const char *str );
		uint	Hash	( const char *str, uint i );
		EAtom	table[HASH_SIZE];
	};


